Building a Privacy-First URL Shortener on Blockchain

说明与用途

构建了一个隐私优先的 URL 缩短器，客户端加密目标地址，存储在区块链上，浏览器本地解密，消除跟踪和中心化数据库风险。

问题

Traditional URL shorteners log user data, track browsing patterns, and sell data, creating privacy risks and a single point of failure.

结果

The system provides a URL shortener that never sees the destination URL, eliminates tracking, and stores data on an immutable blockchain, enhancing privacy and resilience.

工作流

• Generate a random IV and AES‑GCM key in the browser.
• Encrypt the destination URL with Web Crypto API.
• Send the ciphertext to a Cloudflare Worker.
• Worker writes the ciphertext to the Cronos blockchain via a transaction.
• User accesses the short link, Worker fetches ciphertext from blockchain.
• Browser decrypts ciphertext locally and redirects to the original URL.

证据

Encrypted URL stored on Cronos blockchain

来源

Server never sees destination

来源